首页 / 软件开发 / .NET编程技术 / 自定义组件 UITypeEditor

using System;using System.ComponentModel;using System.Drawing;using System.Drawing.Design;using System.Windows.Forms;using System.Windows.Forms.Design;namespace MyLib{// This UITypeEditor can be associated with Int32, Double and Single// properties to provide a design-mode angle selection interface.//[System.Security.Permissions.PermissionSet（System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust"）]public class AngleEditor : System.Drawing.Design.UITypeEditor{public AngleEditor（）{}// Indicates whether the UITypeEditor provides a form-based （modal） dialog,// drop down dialog, or no UI outside of the properties window.public override System.Drawing.Design.UITypeEditorEditStyle GetEditStyle（System.ComponentModel.ITypeDescriptorContext context）{return UITypeEditorEditStyle.DropDown;}// Displays the UI for value selection.public override object EditValue（System.ComponentModel.ITypeDescriptorContext context, System.IServiceProvider provider, object value）{// Return the value if the value is not of type Int32, Double and Single.if （value.GetType（） ！= typeof（double） && value.GetType（） ！= typeof（float） && value.GetType（） ！= typeof（int））return value;// Uses the IWindowsFormsEditorService to display a// drop-down UI in the Properties window.IWindowsFormsEditorService edSvc = （IWindowsFormsEditorService）provider.GetService（typeof（IWindowsFormsEditorService））;if （edSvc ！= null）{// Display an angle selection control and retrieve the value.AngleControl angleControl = new AngleControl（（double）value）;edSvc.DropDownControl（angleControl）;// Return the value in the appropraite data format.if （value.GetType（） == typeof（double））return angleControl.angle;else if （value.GetType（） == typeof（float））return （float）angleControl.angle;else if （value.GetType（） == typeof（int））return （int）angleControl.angle;}return value;}// Draws a representation of the property"s value.public override void PaintValue（System.Drawing.Design.PaintValueEventArgs e）{int normalX = （e.Bounds.Width / 2）;int normalY = （e.Bounds.Height / 2）;// Fill background and ellipse and center point.e.Graphics.FillRectangle（new SolidBrush（Color.DarkBlue）, e.Bounds.X, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height）;e.Graphics.FillEllipse（new SolidBrush（Color.White）, e.Bounds.X + 1, e.Bounds.Y + 1, e.Bounds.Width - 3, e.Bounds.Height - 3）;e.Graphics.FillEllipse（new SolidBrush（Color.SlateGray）, normalX + e.Bounds.X - 1, normalY + e.Bounds.Y - 1, 3, 3）;// Draw line along the current angle.double radians = （（double）e.Value * Math.PI） / （double）180;e.Graphics.DrawLine（new Pen（new SolidBrush（Color.Red）, 1）, normalX + e.Bounds.X, normalY + e.Bounds.Y,e.Bounds.X + （normalX + （int）（（double）normalX * Math.Cos（radians）））,e.Bounds.Y + （normalY + （int）（（double）normalY * Math.Sin（radians））））;}// Indicates whether the UITypeEditor supports painting a// representation of a property"s value.public override bool GetPaintValueSupported（System.ComponentModel.ITypeDescriptorContext context）{return true;}}// Provides a user interface for adjusting an angle value.internal class AngleControl : System.Windows.Forms.UserControl{// Stores the angle.public double angle;// Stores the rotation offset.private int rotation = 0;// Control state tracking variables.private int dbx = -10;private int dby = -10;private int overButton = -1;public AngleControl（double initial_angle）{this.angle = initial_angle;this.SetStyle（ControlStyles.AllPaintingInWmPaint, true）;}protected override void OnPaint（System.Windows.Forms.PaintEventArgs e）{// Set angle origin point at center of control.int originX = （this.Width / 2）;int originY = （this.Height / 2）;// Fill background and ellipse and center point.e.Graphics.FillRectangle（new SolidBrush（Color.DarkBlue）, 0, 0, this.Width, this.Height）;e.Graphics.FillEllipse（new SolidBrush（Color.White）, 1, 1, this.Width - 3, this.Height - 3）;e.Graphics.FillEllipse（new SolidBrush（Color.SlateGray）, originX - 1, originY - 1, 3, 3）;// Draw angle markers.int startangle = （270 - rotation） % 360;e.Graphics.DrawString（startangle.ToString（）, new Font（"Arial", 8）, new SolidBrush（Color.DarkGray）, （this.Width / 2） - 10, 10）;startangle = （startangle + 90） % 360;e.Graphics.DrawString（startangle.ToString（）, new Font（"Arial", 8）, new SolidBrush（Color.DarkGray）, this.Width - 18, （this.Height / 2） - 6）;startangle = （startangle + 90） % 360;e.Graphics.DrawString（startangle.ToString（）, new Font（"Arial", 8）, new SolidBrush（Color.DarkGray）, （this.Width / 2） - 6, this.Height - 18）;startangle = （startangle + 90） % 360;e.Graphics.DrawString（startangle.ToString（）, new Font（"Arial", 8）, new SolidBrush（Color.DarkGray）, 10, （this.Height / 2） - 6）;// Draw line along the current angle.double radians = （（（（angle + rotation） + 360） % 360） * Math.PI） / （double）180;e.Graphics.DrawLine（new Pen（new SolidBrush（Color.Red）, 1）, originX, originY,originX + （int）（（double）originX * （double）Math.Cos（radians））,originY + （int）（（double）originY * （double）Math.Sin（radians）））;// Output angle information.e.Graphics.FillRectangle（new SolidBrush（Color.Gray）, this.Width - 84, 3, 82, 13）;e.Graphics.DrawString（"Angle: " + angle.ToString（"F4"）, new Font（"Arial", 8）, new SolidBrush（Color.Yellow）, this.Width - 84, 2）;// Draw square at mouse position of last angle adjustment.e.Graphics.DrawRectangle（new Pen（new SolidBrush（Color.Black）, 1）, dbx - 2, dby - 2, 4, 4）;// Draw rotation adjustment buttons.if （overButton == 1）{e.Graphics.FillRectangle（new SolidBrush（Color.Green）, this.Width - 28, this.Height - 14, 12, 12）;e.Graphics.FillRectangle（new SolidBrush（Color.Gray）, 2, this.Height - 13, 110, 12）;e.Graphics.DrawString（"Rotate 90 degrees left", new Font（"Arial", 8）, new SolidBrush（Color.White）, 2, this.Height - 14）;}elsee.Graphics.FillRectangle（new SolidBrush（Color.DarkGreen）, this.Width - 28, this.Height - 14, 12, 12）;if （overButton == 2）{e.Graphics.FillRectangle（new SolidBrush（Color.Green）, this.Width - 14, this.Height - 14, 12, 12）;e.Graphics.FillRectangle（new SolidBrush（Color.Gray）, 2, this.Height - 13, 116, 12）;e.Graphics.DrawString（"Rotate 90 degrees right", new Font（"Arial", 8）, new SolidBrush（Color.White）, 2, this.Height - 14）;}elsee.Graphics.FillRectangle（new SolidBrush（Color.DarkGreen）, this.Width - 14, this.Height - 14, 12, 12）;e.Graphics.DrawEllipse（new Pen（new SolidBrush（Color.White）, 1）, this.Width - 11, this.Height - 11, 6, 6）;e.Graphics.DrawEllipse（new Pen（new SolidBrush（Color.White）, 1）, this.Width - 25, this.Height - 11, 6, 6）;if （overButton == 1）e.Graphics.FillRectangle（new SolidBrush（Color.Green）, this.Width - 25, this.Height - 6, 4, 4）;elsee.Graphics.FillRectangle（new SolidBrush（Color.DarkGreen）, this.Width - 25, this.Height - 6, 4, 4）;if （overButton == 2）e.Graphics.FillRectangle（new SolidBrush（Color.Green）, this.Width - 8, this.Height - 6, 4, 4）;elsee.Graphics.FillRectangle（new SolidBrush（Color.DarkGreen）, this.Width - 8, this.Height - 6, 4, 4）;e.Graphics.FillPolygon（new SolidBrush（Color.White）, new Point[] { new Point（this.Width - 7, this.Height - 8）, new Point（this.Width - 3, this.Height - 8）, new Point（this.Width - 5, this.Height - 4） }）;e.Graphics.FillPolygon（new SolidBrush（Color.White）, new Point[] { new Point（this.Width - 26, this.Height - 8）, new Point（this.Width - 21, this.Height - 8）, new Point（this.Width - 25, this.Height - 4） }）;}protected override void OnMouseDown（System.Windows.Forms.MouseEventArgs e）{// Handle rotation adjustment button clicks.if （e.X >= this.Width - 28 && e.X <= this.Width - 2 && e.Y >= this.Height - 14 && e.Y <= this.Height - 2）{if （e.X <= this.Width - 16）rotation -= 90;else if （e.X >= this.Width - 14）rotation += 90;if （rotation < 0）rotation += 360;rotation = rotation % 360;dbx = -10;dby = -10;}elseUpdateAngle（e.X, e.Y）;this.Refresh（）;}protected override void OnMouseMove（System.Windows.Forms.MouseEventArgs e）{if （e.Button == MouseButtons.Left）{UpdateAngle（e.X, e.Y）;overButton = -1;}else if （e.X >= this.Width - 28 && e.X <= this.Width - 16 && e.Y >= this.Height - 14 && e.Y <= this.Height - 2）overButton = 1;else if （e.X >= this.Width - 14 && e.X <= this.Width - 2 && e.Y >= this.Height - 14 && e.Y <= this.Height - 2）overButton = 2;elseoverButton = -1;this.Refresh（）;}private void UpdateAngle（int mx, int my）{// Store mouse coordinates.dbx = mx;dby = my;// Translate y coordinate input to GetAngle function to correct for ellipsoid distortion.double widthToHeightRatio = （double）this.Width / （double）this.Height;int tmy;if （my == 0）tmy = my;else if （my < this.Height / 2）tmy = （this.Height / 2） - （int）（（（this.Height / 2） - my） * widthToHeightRatio）;elsetmy = （this.Height / 2） + （int）（（double）（my - （this.Height / 2）） * widthToHeightRatio）;// Retrieve updated angle based on rise over run.angle = （GetAngle（this.Width / 2, this.Height / 2, mx, tmy） - rotation） % 360;}private double GetAngle（int x1, int y1, int x2, int y2）{double degrees;// Avoid divide by zero run values.if （x2 - x1 == 0）{if （y2 > y1）degrees = 90;elsedegrees = 270;}else{// Calculate angle from offset.double riseoverrun = （double）（y2 - y1） / （double）（x2 - x1）;double radians = Math.Atan（riseoverrun）;degrees = radians * （（double）180 / Math.PI）;// Handle quadrant specific transformations.if （（x2 - x1） < 0 || （y2 - y1） < 0）degrees += 180;if （（x2 - x1） > 0 && （y2 - y1） < 0）degrees -= 180;if （degrees < 0）degrees += 360;}return degrees;}}public class AngleEditorTestControl : System.Windows.Forms.UserControl{private double int_angle;[BrowsableAttribute（true）][Editor（typeof（AngleEditor）, typeof（System.Drawing.Design.UITypeEditor））]public double Angle{get{ return int_angle; }set{ int_angle = value; }}public AngleEditorTestControl（）{int_angle = 90;this.Size = new Size（190, 42）;this.BackColor = Color.Beige;}protected override void OnPaint（System.Windows.Forms.PaintEventArgs e）{if （this.DesignMode）{e.Graphics.DrawString（"Use the Properties Window to access", new Font（"Arial", 8）, new SolidBrush（Color.Black）, 3, 2）;e.Graphics.DrawString（"the AngleEditor UITypeEditor by", new Font（"Arial", 8）, new SolidBrush（Color.Black）, 3, 14）;e.Graphics.DrawString（"configuring the "Angle" property.", new Font（"Arial", 8）, new SolidBrush（Color.Black）, 3, 26）;}elsee.Graphics.DrawString（"This example requires design mode.", new Font（"Arial", 8）, new SolidBrush（Color.Black）, 3, 2）;}}}